Your daughter’s Rx must have been brand-name Vibramycin (I see you realize that). I just bought #100 100mg generic doxycycline online for $73. The price has gone up as I used to buy it for $25. As you say, at a walk in chemist or farmacia in a third-world country it would be less.
This is for acne. It seems strange to me they are still treating acne with these methods. I thought they'd have something new and improved. (besides Accutane).